KSI Says Logan Paul Fight is a Stepping Stone to Pro Boxing Career

KSI's fight with Logan Paul is set to be one of the biggest sporting events of the year ... but the British YouTuber says he's got even BIGGER plans in mind ... telling TMZ Sports he's dead set on going pro!!

We spoke with KSI -- who more than 19 MILLION subscribers on YouTube -- about the August 25 fight in Manchester, and he says he's not putting on an act ... his hatred for the Pauls is VERY real.